Hi Sanket,
Are you planning to buy flats in Haware Citi, Ghodbunder Road, Thane? It is better if you visit the project site. You will be aware of the current issues. Nobody can give you the right information except people living in that building. So, visit the site, there you will see the construction quality of the building, civic issues in the locality as well as in the flats. Ask some flat owners who has bought flats in it. After all, it is matter of your hard earned money.
And if you want investment advice in thane, then i will say, yes. Thane West is one of the well developed localities in Mumbai which falls under the Mumbai Metropolitan Region. It is only 4.3 - kilometers - 7-minute drive from Eastern Express Highway and 5.1 kilometers from the Thane Railway Station. It is also within close proximity to NH-3, NH-4 and enjoys good connectivity with the rest of Mumbai.